2001-07-20 Roland McGrath <roland@frob.com>

	* libio/stdio_ext.h: Moved to ...
	* stdio-common/stdio_ext.h: ... here.
	* libio/Makefile (headers): Move stdio_ext.h from here ...
	* stdio-common/Makefile (headers): ... to here.
	* include/stdio_ext.h: New file.
	* stdio/Makefile (routines): Add the stdio_ext.h functions here.
	* stdio/Versions (GLIBC_2.2.4): Export the stdio_ext.h functions.
	* stdio/__flbf.c: New file.
	* stdio/__fbufsize.c: New file.
	* stdio/__fpending.c: New file.
	* stdio/__fpurge.c: New file.
	* stdio/__freadable.c: New file.
	* stdio/__freading.c: New file.
	* stdio/__fsetlocking.c: New file.
	* stdio/__fwritable.c: New file.
	* stdio/__fwriting.c: New file.

11 files changed, 251 insertions, 1 deletions

diff --git a/stdio/Makefile b/stdio/Makefile
index 5c56249646..53cf73cdb4 100644
--- a/stdio/Makefile
+++ b/stdio/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
+# Copyright (C) 1991,92,93,94,95,96,2001 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -37,6 +37,8 @@ routines	:=							      \
 	fclose fcloseall fflush						      \
 	vdprintf vsnprintf vsprintf vasprintf vsscanf vscanf		      \
 	memstream obstream linewrap					      \
+	__fbufsize __freading __fwriting __freadable __fwritable __flbf	      \
+	__fpurge __fpending __fsetlocking				      \
 	internals sysd-stdio pipestream stdio_init libc_fatal
 aux	:= defs glue
 
diff --git a/stdio/Versions b/stdio/Versions
index 9700ba68cc..ccfda9c268 100644
--- a/stdio/Versions
+++ b/stdio/Versions
@@ -62,4 +62,9 @@ libc {
     # p*
     putc_unlocked; putchar_unlocked;
   }
+  GLIBC_2.2.4 {
+    # Functions to access FILE internals.
+    __fbufsize; __freading; __fwriting; __freadable; __fwritable; __flbf;
+    __fpurge; __fpending; __fsetlocking; _flushlbf;
+  }
 }
diff --git a/stdio/__fbufsize.c b/stdio/__fbufsize.c
new file mode 100644
index 0000000000..ad42ee2427
--- /dev/null
+++ b/stdio/__fbufsize.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+size_t
+__fbufsize (FILE *fp)
+{
+  return fp->__bufsize;
+}
diff --git a/stdio/__flbf.c b/stdio/__flbf.c
new file mode 100644
index 0000000000..9eb80abdbf
--- /dev/null
+++ b/stdio/__flbf.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+int
+__flbf (FILE *fp)
+{
+  return fp->__linebuf;
+}
diff --git a/stdio/__fpending.c b/stdio/__fpending.c
new file mode 100644
index 0000000000..0e7b8f02f0
--- /dev/null
+++ b/stdio/__fpending.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+size_t
+__fpending (FILE *fp)
+{
+  return (fp->__put_limit >= fp->__bufp ? fp->__bufp - fp->__buffer : 0);
+}
diff --git a/stdio/__fpurge.c b/stdio/__fpurge.c
new file mode 100644
index 0000000000..db882b68f5
--- /dev/null
+++ b/stdio/__fpurge.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+void
+__fpurge (FILE *fp)
+{
+  fp->__get_limit = fp->__put_limit = fp->__bufp = fp->__buffer;
+}
diff --git a/stdio/__freadable.c b/stdio/__freadable.c
new file mode 100644
index 0000000000..5674d5bef5
--- /dev/null
+++ b/stdio/__freadable.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+int
+__freadable (FILE *fp)
+{
+  return !!fp->__mode.__read;
+}
diff --git a/stdio/__freading.c b/stdio/__freading.c
new file mode 100644
index 0000000000..16d0fd97f8
--- /dev/null
+++ b/stdio/__freading.c
@@ -0,0 +1,26 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+int
+__freading (FILE *fp)
+{
+  /* This is not really right for unbuffered streams.  */
+  return (!fp->__mode.__write || fp->__put_limit == fp->__buffer);
+}
diff --git a/stdio/__fsetlocking.c b/stdio/__fsetlocking.c
new file mode 100644
index 0000000000..a0e40d71c9
--- /dev/null
+++ b/stdio/__fsetlocking.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int
+__fsetlocking (FILE *fp, int type)
+{
+  /* We don't really support locking.  */
+
+  switch (type)
+    {
+    case FSETLOCKING_QUERY:
+    case FSETLOCKING_BYCALLER:
+      break;
+    case FSETLOCKING_INTERNAL:
+      abort ();
+    default:
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return FSETLOCKING_BYCALLER;
+}
diff --git a/stdio/__fwritable.c b/stdio/__fwritable.c
new file mode 100644
index 0000000000..396629542c
--- /dev/null
+++ b/stdio/__fwritable.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+int
+__fwritable (FILE *fp)
+{
+  return !!fp->__mode.__write;
+}
diff --git a/stdio/__fwriting.c b/stdio/__fwriting.c
new file mode 100644
index 0000000000..36266ef34d
--- /dev/null
+++ b/stdio/__fwriting.c
@@ -0,0 +1,26 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio_ext.h>
+
+int
+__fwriting (FILE *fp)
+{
+  /* This is not really right for unbuffered streams.  */
+  return (!fp->__mode.__read || fp->__get_limit == fp->__buffer);
+}